This proposes to adjust how aliases are formatted.

Currently we include a space around `=`, which means we get the quite reasonable:

```elm
sum_gross_cost = sum gross_cost
```

...but also the quite confusing:

```elm
join side:left manager = employees e.reports_to == manager.employee_id`
```

There, the _least_ two bound items appear to be `manager` & `employees`, but in fact those are bound.

So this proposes to change these to:
- Remove spaces around `=` in aliases
- Add parentheses if the rvalue contains multiple items

So now we get:

```elm
join side:left manager=employees e.reports_to == manager.employee_id`
```

...while the standard case here becomes arguable a bit worse, but still quite reasonable:

```elm
sum_gross_cost = (sum gross_cost)
```

What do folks think?

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